PRODUCTS

POTASSIUM METABISULFITE

Potassium Metabisulfite is used in some pickles as a preservative.
Potassium Metabisulfite is used in tint etching iron-based metal samples for microstructural analysis.
Potassium Metabisulfite is used in aam papad as a preservative.

CAS Number: 16731-55-8
EC Number: 224-142-6
E number: E224 (preservatives)
Chemical Formula: K2S2O5
Molecular Weight: 222.32 g/mol

SYNONYMS:
Potassium disulfite, Dipotassium disulfite, Dipotassium pyrosulfite, Potassium pyrosulfite, Pyrosulfurous acid dipotassium salt, E224, Kalii metabisulphis, Kaliumdisulfit, Potassium pyrosulfite, Dipotassium disulfite, Potassium metabisulphite, Dipotassium disulphite, POTASSIUM METABISULFITE, 16731-55-8, Potassium disulfite, Potassium pyrosulfite, Dipotassium pyrosulfite, Sobisu, potassium metabisulphite, Potassium pentaoxodisulfate, Ins-224, Potassium metabisulfite [NF], Potassium metabisulfite (e 224), 65OE787Q7W, Dipotassium disulfite, E-224, Potassium metabisulfite (NF), Dipotassium disulphite, Dipotassium metabisulfite, CCRIS 1427, Potassium disulfite (K2S2O5), HSDB 5062, Pyrosulfurous acid, dipotassium salt, EINECS 240-795-3, Kaliumpyrosulfit, UNII-65OE787Q7W, potassium meta-bisulfite, EC 240-795-3, Potassium disulfite, >=98%, CHEMBL2106901, DTXSID1021293, Potassium disulfite, AR, >=97%, Potassium disulfite, LR, >=95%, POTASSIUM METABISULFITE [II], POTASSIUM METABISULFITE [MI], MFCD00167605, POTASSIUM METABISULFITE [FCC], POTASSIUM METABISULFITE [HSDB], AKOS015912829, POTASSIUM METABISULFITE [MART.], POTASSIUM METABISULFITE [VANDF], Potassium disulfite, analytical standard, POTASSIUM METABISULFITE [WHO-DD], DB-231696, Potassium disulfite, USP, 51.8-57.6%, NS00013994, P2480, POTASSIUM METABISULFITE [EP IMPURITY], POTASSIUM METABISULFITE [EP MONOGRAPH], D05581, Potassium disulfite, BioUltra, >=97.0% (RT), Q417881, J-010353, Potassium disulfite, Vetec(TM) reagent grade, 98%, Potassium disulfite, puriss. p.a., >=96% (iodometric), powder, Sulfite, potassium metabi-dipotassium oxidosulfanesulfonate oxide, Potassium disulfite, puriss., meets analytical specification of Ph.Eur., BP, NF, FCC, E224, 95.0-101.0% (iodometric), powder, 51.8-57.6% sulfur dioxide.

Potassium Metabisulfite, (often referred to as "SO2", "sulfites" "meta", or "meta-bi") has several uses in winemaking.
At the crush, sulfites are generally used to help control the spoilage bacteria and indigenous yeast that may already be present both on the fruit and in the winery (i.e. on the picking bins, processing equipment, tanks, tubing, etc).

The amount generally used is enough to inhibit most of the unwanted organisms but not enough to hinder a cultured yeast, which has a higher tolerance to sulfites than most of the indigenous organisms do.
This inhibition effectively "wipes the slate clean" for the cultured yeast to step in and rapidly colonize the must so that it can effectively dominate the subsequent fermentation.

In addition, sulfites also help to inhibit the enzymatic browning of both musts and finished wines so that all of their delicate complexities can be preserved.
Later, during storage and in the bottle, sulfites at the proper levels will further protect a wine by continuing to inhibit spoilage organisms, as well as by scavenging oxygen.

Note that the exact amount needed to effectively do the job is determined by the pH of the wine.
Potassium Metabisulfite appears as a white granular or powdery solid with a sharp odor of sulfur dioxide.
Potassium Metabisulfite decomposes at 150 to 190 °C. Density 2.3 g / cm3.

Potassium Metabisulfite is an inorganic salt.
Potassium Metabisulfite, (often referred to as "SO2", "sulfites" "meta", or "meta-bi") has several uses in winemaking.
At the crush, sulfites are generally used to help control the spoilage bacteria and indigenous yeast that may already be present both on the fruit and in the winery (i.e. on the picking bins, processing equipment, tanks, tubing, etc).

Potassium Metabisulfite is a white crystalline powder which provides a convenient way of adding measured quantities of sulphur dioxide.
Potassium Metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent odour.
Potassium Metabisulfite is mainly used as an antioxidant or chemical sterilant.

As a disulfite, Potassium Metabisulfite is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably.
Potassium Metabisulfite has a monoclinic crystal structure.
Potassium Metabisulfite is a salt of inorganic origin that contains sulfur and is capable of producing or generating sulfur dioxide when dissociated in an acid medium.

Potassium Metabisulfite is one of the most important winemaking compounds.
Potassium Metabisulfite is an antioxidant and bactericide that releases sulfur dioxide into wine must.
Use 1/4 teaspoon per five gallons to add 50 ppm.

Or, mix 1/4 pound in 1 quart of water to make a stock solution; 1 teaspoon of stock solution in 1 gallon of must yields 50 ppm sulfur dioxide.
In addition, Potassium Metabisulfite's important to keep in mind that free SO2 levels fall faster in wood cooperage than in glass or stainless, so if you are using a barrel you will most likely need to manage sulfite levels more closely.

The most common form of Metabisulfite is as a powder which is fixed with potassium or sodium.
1/4 tsp of Potassium Metabisulfite adds 50ppm to 5 gallons of must.
Old Metabisulfite loses potency with time and should be replaced every year to assure that you are getting correct levels.

You can use old Metabisulfite to make solutions for sanitizing equipment.
Potassium Metabisulfite is a white to off-white granular powder with a sharp, pungent, sulphurous odor.
Potassium Metabisulfite, also known as potassium pyrosulfite, is a white crystalline powder with a pungent sulfur odour.

Potassium Metabisulfite is a disulphide and is chemically very similar to sodium metabisulphite, with which it is sometimes used interchangeably.
Potassium Metabisulfite is generally preferred out of the two as it does not contribute sodium to the diet.
Potassium Metabisulfite is a common wine or must additive, in which it forms sulfur dioxide gas (SO2).

This both prevents most wild microorganisms from growing, and Potassium Metabisulfite acts as a potent antioxidant, protecting both the colour and delicate flavours of wine.
The typical dosage is 1/4 tsp (1.2322304 milliliters) Potassium Metabisulfite per 5 gallons of must (yielding roughly 75 ppm of SO2) prior to fermentation; then 1/2 tsp per five-gallon bucket (150 ppm of SO2) at bottling.

Most commercial wineries do not add more than 30ppm at bottling.
Winemaking equipment is sanitized by spraying with a 1% SO2 (2 tsp Potassium Metabisulfite per L) solution
When dissolved in water this releases sulphur dioxide which has many important properties in wine and beer making:-

Potassium Metabisulfite has antiseptic qualities which will stun, if not kill, the bacteria and wild yeasts in or on fruit.
Potassium Metabisulfite has antioxidant qualities which help prevent the effects of oxidation in beer, cider or wine.
Potassium Metabisulfite destroys the enzyme that causes enzymatic browning in juice, similar to what happens to an apple if it is sliced and exposed to the air.

Without sulphite in some form much wine would be brown or amber in colour, smell oxidized (or have a sherry-like aroma), and would probably be ruined by bacterial spoilage.
Beer makers will also appreciate that sulphite also removes chlorine from water and therefore reduces the chance of beer being tainted with TCP flavours.

We recommend Potassium Metabisulfite both for adding to wine and as a steriliser but Sodium Metabisulphite as a steriliser only as it does impart a significant aroma and flavour to the wine especially in the short term.
Potassium Metabisulfite, (often referred to as "SO2", "sulfites" "meta", or "meta-bi") has several uses in winemaking.

At the crush, sulfites are generally used to help control the spoilage bacteria and indigenous yeast that may already be present both on the fruit and in the winery (i.e. on the picking bins, processing equipment, tanks, tubing, etc).
The amount generally used is enough to inhibit most of the unwanted organisms but not enough to hinder a cultured yeast, which has a higher tolerance to sulfites than most of the indigenous organisms do.

This inhibition effectively "wipes the slate clean" for the cultured yeast to step in and rapidly colonize the must so that Potassium Metabisulfite can effectively dominate the subsequent fermentation.
In addition, sulfites also help to inhibit the enzymatic browning of both musts and finished wines so that all of their delicate complexities can be preserved.

Later, during storage and in the bottle, sulfites at the proper levels will further protect a wine by continuing to inhibit spoilage organisms, as well as by scavenging oxygen.
Note that the exact amount needed to effectively do the job is determined by the pH of the wine.

In addition, it's important to keep in mind that free SO2 levels fall faster in wood cooperage than in glass or stainless, so if you are using a barrel you will most likely need to manage sulfite levels more closely.
The most common form of Metabisulfite is as a powder which is fixed with potassium or sodium.
1/4 tsp of Potassium Metabisulfite adds 50ppm to 5 gallons of must.

Old Metabisulfite loses potency with time and should be replaced every year to assure that you are getting correct levels.
You can use old Metabisulfite to make solutions for sanitizing equipment.
Potassium Metabisulfite is an important wine making ingredient.

Potassium Metabisulfite preserves and stabilizes wines, ciders and meads.
When added to must Potassium Metabisulfite forms SO2 (sulfur dioxide gas), which prevents wild microorganisms or wild yeast from growing.
Potassium Metabisulfite also acts as a potent antioxidant to protect your wine’s color and flavor.

Add to wine or mead must 24 hours before pitching yeast to inhibit spoilage bacteria before fermentation begins.
Potassium Metabisulfite can also use in conjunction with Potassium Sorbate to help stabilize a wine prior to backsweetening or corking to prevent re-fermentation in storage.

Compared to Sodium metabisulphite (campden tablets), Potassium Metabisulfite releases slightly lower amounts of sulfite into a wine.
Potassium Metabisulfite, K2S2O5, also known as potassium pyrosulfite, is a white crystalline powder with a pungent sulfur odour. The main use for Potassium Metabisulfite is as an antioxidant or chemical sterilant.

Potassium Metabisulfite is a disulfite and is chemically very similar to sodium metabisulfite, with which it is sometimes used interchangeably.
Potassium Metabisulfite is generally preferred out of the two as it does not contribute sodium to the diet.
Potassium Metabisulfite is soluble in water.

Potassium Metabisulfite (K2S2O5), commonly abbreviated KMS, is a powdery, white, strongly sulfurous-smelling (burned match) chemical used in many food and beverage industries, as well as in breweries as an antioxidant.
When dissolved in water or beer, Potassium Metabisulfite releases free sulfite ions, and these are responsible for the antioxidative properties of the compound.

Potassium Metabisulfite is by far the most popular antioxidant used in the brewing industry.
Its popularity within some large breweries is because Potassium Metabisulfite is highly effective at preventing oxidation and because the added sulfites improve the naturally occurring sulfites produced by the yeast during fermentation.

Potassium Metabisulfite is also active in limiting growth of wild yeasts and bacteria in beer.
Free sulfite reacts very readily with and thus eliminates free oxygen in foods (including beer), but also with many intermediary chemicals compounds (most important, aldehydes and ketones) that can combine with free oxygen into the stale and papery-tasting compounds so undesirable in beer.

Potassium Metabisulfite is allowed by Food Health and Safety authorities in most countries (it has the E-number 224 on the EU positive list of food additives) around the world, but it is not permitted by Germany’s Reinheitsgebot.
Potassium Metabisulfite is rarely used by craft brewers anywhere, but it is common in mass-market beers in many countries.

In most countries the use of Potassium Metabisulfite is regulated by specific limits either to the total concentration of sulfites in beer or by maximum allowed dosing rates.
The reason for these limitations is that sulfites are known to provoke and worsen certain allergies in humans.

For example, in the United States, levels above 10 ppm will require the words “contains sulfites” to be printed on the label.
Potassium Metabisulfite is a food preservative that protects against germs while preserving the natural color of food.
Using potassium powder mixture in food items allows for a significant reduction in sodium content.

Potassium Metabisulfite, also known as the food additive E224 or potassium pyrosulfate, is a food preservative which preserves the natural colour of food and protect against bacteria.
Potassium Metabisulfite is a white crystalline powder that has a strong sulfur odor.

Additionally, Potassium Metabisulfite is a disulfite and has a melting point of 374 degrees Fahrenheit.
Some potential dangers associated with exposure to Potassium Metabisulfite include severe burning and damage to your eyes, irritation and reddening of your skin and difficulty breathing.

If exposed to the raw, unprocessed form of Potassium Metabisulfite, you should immediately seek medical attention.
Flush your eyes with water for 15 minutes and use water to remove any of Potassium Metabisulfite from your skin.

The additive is produced from potassium hydroxide (KOH) or potassium carbonate (K2CO3), both potassium derivatives manufactured by Vynova.
KOH and K2CO3 find their origin in an electrochemical process involving potassium chloride (KCl), a salt that naturally occurs in the earth’s crust and is widely used in the feed and fertilizer industry.

USES and APPLICATIONS of POTASSIUM METABISULFITE:
Potassium Metabisulfite is sometimes added to lemon juice as a preservative.
Potassium Metabisulfite is used in the textile industry for dyeing and cotton printing.
Potassium Metabisulfite is sometimes used to precipitate gold from solution in aqua regia (as an alternative to sodium sulfite).

Potassium Metabisulfite is a component of certain photographic developers and solutions used in photographic processing, keeping active developing species from contact with oxygen.
Potassium Metabisulfite is used as a bleaching agent in the production of coconut cream.

Pharmaceuticals: Potassium Metabisulfite is occasionally used as an antioxidant or antimicrobial additive in certain medications.
Textile Industry: Potassium Metabisulfite is utilized in the bleaching of textiles and wool.
Personal Care Products: Potassium Metabisulfite acts as a reducing agent or stabilizer in certain cosmetic formulations.

Potassium Metabisulfite is used as a food preservative and an antioxidant.
Potassium Metabisulfite is used as a food additive, also known as E224.
Potassium Metabisulfite is restricted in use and may cause allergic reactions in some sensitive persons.

Potassium Metabisulfite is used predominantly in making wines and beers, for its prevention of bacteria and other microorganisms.
Potassium Metabisulfite can also be used as a preservative for acidic environments, such as lemon juice and pickling agents.
Potassium Metabisulfite is used for rinsing wine-making and beer-brewing equipment - ensures that the equipment used for fermentation is perfectly clean.

Potassium Metabisulfite is used for stabilising fruit juices and musts - prevents the growth of bacteria, mould and wild yeasts.
Potassium Metabisulfite is used for stabilising wines - prevents oxidation, stabilises the colour and clarity of wines.
Potassium Metabisulfite is used for stopping fermentation - an addition of metabisulfite effectively destroys yeast cells, it can be used as fermentation stopper.

Safe for health - Potassium Metabisulfite is widely used in the food, wine-making and brewing industries.
When used in accordance with the instructions, Potassium Metabisulfite is fully safe.
Potassium Metabisulfite is widely used in the wine-making and brewing industries.

Potassium metabisulfite protects wine batches from contamination and eliminates the presence of the so-called wild yeasts.
When used with ready wines, Potassium Metabisulfite stops fermentation, stabilises the colour and clarity.
Potassium metabisulfite is also an excellent disinfectant used for rinsing wine-making, brewing or distilling equipment.

Potassium Metabisulfite is used as an antioxidant in beer.
Potassium Metabisulfite may be used at modest levels (10ppm free SO2) to provide protection from headspace oxygen.
Potassium Metabisulfite is used Antioxidant and antimicrobial agent

Potassium Metabisulfite is a high quality white crystalline powder that does not clump.
Dissolve Potassium Metabisulfite in cold water and add directly.
100 grams of Potassium Metabisulfite releases around 57.6 g SO2.

To optimize the use of Potassium Metabisulfite, we recommend trials prior to the routine use of the antioxidant.
This assures optimum protection and uniform beer quality.
Potassium Metabisulfite is normally added at 10 – 20 ppm is (0.25 to 0.50 lb/100bbl.; 1-2 g/hl) of beer.

Maximum addition depends upon application but should not generally exceed 100ppm.
Potassium Metabisulfite can be used throughout the winemaking process from grape receipt to finished wine.
Potassium Metabisulfite can be used throughout the winemaking process from grape receipt to finished wine to adjust sulfur dioxide (SO2).

The main use for Potassium Metabisulfite is as an antioxidant or chemical sterilant.
Potassium Metabisulfite is used as a food and beverage additive, also known as E224

Potassium Metabisulfite is used as an antiseptic, reagent, source of sulphurous acid, brewing (cleaning casks and vats), wine-making (said to kill only undesirable yeasts and bacteria), food preservative, developing agent (photography), process engraving and lithography, dyeing, antioxidant, bleaching agent.

Potassium Metabisulfite is extensively used in the manufacture of wine, cider, juice, and beer.
In Copper Electroplating Potassium Metabisulfite is used as sequestrant.
Potassium Metabisulfite is a wine additive used to kill wild yeast and bacteria, and it acts as a potent antioxidant, protecting both the color and flavors of wine.

"Meta" is a workhorse anti-oxidant and source of sulfur dioxide that comes as close to being mandatory use as any additive in winemaking.
Potassium Metabisulfite is very widely, almost universally, used in the wine industry for the same purposes as in brewing, but in wine Potassium Metabisulfite is used at concentrations 10–20 times higher than in beer.

While it is sometimes used interchangeably with sodium metabisulfite, Potassium Metabisulfite is usually preferred for different reasons.
Firstly, potassium occurs naturally in the human body, in nature and is key for growth and life.

Secondly, the use of Potassium Metabisulfite in food products enables a strong reduction of their sodium content.
In addition, Potassium Metabisulfite is easily assimilated by the human body.

Potassium Metabisulfite is a food preservative, which preserves the natural color of food and protects food against bacteria. Winemakers also use Potassium Metabisulfite to preserve bottled wines.
The manufacturing industry uses Potassium Metabisulfite as a dye and printing agent, in gold processing and in photography for developing.

-Potassium Metabisulfite in wine
In wine making, Potassium Metabisulfite acts as an antioxidant, removing all the oxygen suspended in the wine, which slows down aging.
Natural cork closures enable micro-oxygenation by allowing tiny amounts of oxygen back into the wine so flavours can reach their potential.

In addition to preventing flavours from deteriorating, Potassium Metabisulfite made from Vynova potassium hydroxide (KOH) or potassium carbonate (K2CO3), preserves the colour of the wine, preventing white wines from turning golden brown or red wines from turning orange and then brown.

-Other uses of Potassium Metabisulfite:
Potassium Metabisulfite made from Vynova potassium derivatives has many uses across the food, textile, metal and film industries. Some of these uses include:
*Preserving lemon juice and pickles;
*Preserving fruits as part of the canning or dehydration process;
*Preserving the taste of dehydrated foods to make them more palatable;
*Bleaching agent in coconut cream;
*Stabilising in the brewing industry to inhibit the growth of wild bacteria and fungi;
*Neutralising monochloramine from tap water;
*Dyeing and printing for textiles;
*Precipitating gold from solution in aqua regia (as an alternative to sodium sulfite);
*Developing solutions for photographs.

-Food Industry (E224):
Potassium Metabisulfite is used as a preservative and antioxidant in food and beverages, particularly in winemaking, brewing, and fruit preservation.
Potassium Metabisulfite prevents oxidation, microbial growth, and browning in processed foods.

-Winemaking and Brewing:
Potassium Metabisulfite acts as an antimicrobial agent, killing unwanted yeast and bacteria.
Potassium Metabisulfite helps stabilize wine by preventing secondary fermentation and oxidation.

-Chemical Industry:
Potassium Metabisulfite is used in photography as a developer and fixing agent.
Potassium Metabisulfite is employed in water treatment as a dechlorinating agent.

-Wine
Potassium Metabisulfite is a common wine or must additive, in which it forms sulfur dioxide (SO2).
Sulfur dioxide is a disinfectant.

Potassium Metabisulfite also acts as a potent antioxidant, protecting both the color and delicate flavors of wine.
A high dose would be 3 grams of Potassium Metabisulfite per six-gallon bucket of must or around 132 milligrams per liter (yielding roughly 75 ppm of SO2) prior to fermentation; then 6 grams per six-gallon bucket (150 ppm of SO2) at bottling.

Some countries regulate the SO2 content of wines.
Winemaking equipment is sanitized by spraying with a 1% SO2 (2 tsp Potassium Metabisulfite per L) solution.

-Beer
Potassium Metabisulfite is sometimes used in the brewing industry to inhibit the growth of wild bacteria and fungi.
This step is called 'stabilizing'.

Potassium Metabisulfite is also used to neutralize monochloramine from tap water.
Potassium Metabisulfite is used both by homebrewers and commercial brewers alike.
Potassium Metabisulfite is not used as much for brewing beer, because the wort is almost always boiled, which kills most microorganisms.

-Potassium Metabisulfite is used Antioxidant and antimicrobial preservative (E 224)
In the food industry Potassium Metabisulfite should be regarded as universal, since it is used in a variety of different products.

In oenology it is accepted that the effectiveness of an addition of Potassium Metabisulfite depends on the quantity of molecular sulphur dioxide that develops.
A valuable ally in vinification, refinement and the stages preceding final packaging.

FUNCTIONS OF POTASSIUM METABISULFITE:
Potassium Metabisulfite is a chemical additive that takes the form of a creamy-white crystalline powder and has a characteristic smell of sulphur dioxide, sometimes pungent.
Potassium Metabisulfite performs several functions in the food and wine industry, including:

*Antiseptic capacity:
Potassium Metabisulfite is used to prevent the growth of undesirable microorganisms such as yeasts, bacteria and moulds in food and wine products.
Potassium Metabisulfite's presence prevents contamination and helps keep products more stable.

*Acidifying function:
Potassium Metabisulfite can lower the pH of food products or wines, helping to maintain an acidic environment that hinders the growth of unwanted microorganisms.

*Antioxidant capacity:
Potassium Metabisulfite acts as an antioxidant, helping to prevent oxidation of product components, which can improve its shelf life and organoleptic quality.

*Sterilisation:
in an aqueous solution (generally 20 g of Potassium Metabisulfite per litre of water), Potassium Metabisulfite can be used to sterilise containers, equipment and bottles, helping to reduce the risk of contamination by unwanted microorganisms.

HOW MUCH POTASSIUM METABISULFITE DO YOU NEED?
It can be complicated to work out how much Potassium Metabisulfite to add to your wine.
On the one hand, Potassium Metabisulfite needs to be enough to inhibit most of the unwanted bacteria, while on the other hand the amount shouldn’t hinder the cultured yeast needed for fermentation.

Plus, some countries have restrictions on how much sulphur dioxide (SO2) wines are allowed to contain, which further complicates calculations.
Furthermore, you should only add a small amount to start as it is not easy to remove Potassium Metabisulfite after it has been added.
In fact, if you add too much, there is no chemical way to solve this issue, the only remedy is to give it time to dissipate.

DIRECTIONS FOR USE POTASSIUM METABISULFITE:
Depending on the application:
1) to stabilise must: 1 g per 10 L of must.
Dissolve a proper portion in 50-100 ml of water, add to the must and mix thoroughly.

(2) to stabilise wine before pouring it into bottles: 1 g per 10 L of wine.
Dissolve a proper portion in 50-100 ml of water, add to the must and mix thoroughly.

3) to rinse equipment: 10 g per 2 L of water.
Use Potassium Metabisulfite to rinse demijohns, fermentation containers, bottles, presses, barrels that have been washed with detergent and rinsed with water.

Do not reuse water after rinsing with potassium metabisulfite.
Potassium Metabisulfite is unstable and should therefore be prepared just before use.

After rinsing, Potassium Metabisulfite should be discarded.
Due to Potassium Metabisulfite's characteristic, strong sulfuric odour, it is recommended to use the product only in well-ventilated rooms.

IN WINEMAKING, POTASSIUM METABISULFITE:
Potassium Metabisulfite is a common wine or must additive, in which it forms sulfur dioxide gas (SO2).
This both prevents most wild microorganisms from growing, and Potassium Metabisulfite acts as a potent antioxidant, protecting both the color and delicate flavors of wine.

A high dose would be 3 grams of Potassium Metabisulfite per six-gallon bucket of must (yielding roughly 75 ppm of SO2) prior to fermentation; then 6 grams per six-gallon bucket (150 ppm of SO2) at bottling.

Most commercial wineries do not add more than 30 ppm at bottling.
Some countries impose regulations on how much SO2 wines are allowed to contain.
Winemaking equipment is sanitized by spraying with a 1% SO2 (2 tsp Potassium Metabisulfite per L) solution.

PREPARATION AND REACTIONS OF POTASSIUM METABISULFITE:
Potassium Metabisulfite can be prepared by treating a solution of potassium hydroxide with sulfur dioxide.
2 SO2 + 2 KOH → K2S2O5 + H2O
It decomposes at 190 °C, yielding potassium sulfite and sulfur dioxide:
K2S2O5 → K2SO3 + SO2

BENEFITS AND APPLICATIONS OF POTASSIUM METABISULFITE:
Potassium metabisulfite is used as a preservative in things like lemon juice and pickles.
Potassium Metabisulfite is a potent antioxidant, protecting both the color and delicate flavors of the food.
Potassium Metabisulfite is used in the brewing industry to inhibit the growth of wild bacteria and fungi.
Potassium Metabisulfite neutralizes monochloramine from tap water.
Potassium Metabisulfite is used as a bleaching agent in many food products.

HOW POTASSIUM METABISULFITE WORKS:
Potassium Metabisulfite works as a preservative, antioxidant, and bleaching agent, extending the shelf life of food.
Potassium Metabisulfite works as an antioxidant and a chemical sterilant.

CONCENTRATION AND SOLUBILITY OF POTASSIUM METABISULFITE:
Potassium Metabisulfite is recommended that it should be used at a concentration of 10%.
Potassium Metabisulfite is soluble in water and insoluble in alcohol.

HOW TO USE POTASSIUM METABISULFITE:
Potassium Metabisulfite is manufactured by combining Sulphur dioxide and potassium carbonate at temperatures ranging from 50°C to 80°C.
Cool the reaction mixture.
Potassium Metabisulfite will settle down into a colorless or white crystalline powder/granular after some time.

BENEFITS OF POTASSIUM METABISULFITE:
-Approved for use in food and beverage products
-Potassium Metabisulfite prevents microorganisms from growing and reproducing
-Potassium Metabisulfite prevents biological spoilage
-Potassium Metabisulfite has antioxidant properties
-Potassium Metabisulfite increases the stability and prolongs shelf life of wine, cider and beer
-Potassium Metabisulfite can be used for the removal of free chlorine in tap water which can cause chlorophenolic off flavours in beer
-Potassium Metabisulfite can be used as an alternative to Sodium Metabisulphate where sodium salt is not preferred.

PROPERTIES OF POTASSIUM METABISULFITE:
*Reducing Agent:
Strong reducing properties that make it effective in preventing oxidation.

*Sulfur Dioxide Release:
Potassium Metabisulfite releases SO₂ gas in moist conditions, which serves as the active preservative and antimicrobial agent.

*Stability:
Sensitive to moisture and air exposure, which can cause decomposition.

*Low Toxicity:
Considered safe for use in regulated quantities but can cause respiratory irritation in sensitive individuals.

BENEFIT OF POTASSIUM METABISULFITE:
*Food Preservation:
Potassium Metabisulfite extends shelf life by preventing microbial growth and oxidative degradation.

*Quality Maintenance:
Potassium Metabisulfite maintains color, flavor, and texture in food and beverages.

*Effective Antimicrobial Agent:
Potassium Metabisulfite controls the growth of bacteria, mold, and yeast in various applications.

*Versatile Application:
Potassium Metabisulfite is used across multiple industries due to its chemical stability and effectiveness as a preservative.

PHYSICAL and CHEMICAL PROPERTIES of POTASSIUM METABISULFITE:
Physical state solid,
Color No data available,
Odor No data available,
Melting point/freezing point No data available,
Initial boiling point and boiling range No data available,
Flammability (solid, gas) No data available,
Upper/lower flammability or explosive limits No data available,
Flash point No data available,
Autoignition temperature No data available,
Decomposition temperature No data available,
pH No data available,

Viscosity
Viscosity, kinematic: No data available,
Viscosity, dynamic: No data available,
Water solubility No data available,
Partition coefficient: n-octanol/water No data available,
Vapor pressure No data available,
Density No data available,
Relative density No data available,
Relative vapor density No data available,
Particle characteristics No data available,

Explosive properties No data available,
Oxidizing properties No data available,
Other safety information No data available,
Appearance (Color) White to light yellow,
Appearance (Form) Crystalline powder,
Titration Iodimetric >=96.0 %,
Heavy metals (as Pb) =<10 ppm,
Selenium (Se) =<1 ppm,
Iron (Fe) =<5 ppm,
Arsenic (As) =<1 ppm,
IUPAC Name dipotassium sulfinatosulfonate,

Molecular Formula K2O5S2,
InChI Key RWPGFSMJFRPDDP-UHFFFAOYSA-L,
SMILES [K+].[K+].[O-]S(=O)S([O-])(=O)=O,
Molecular Weight (g/mol) 222.31,
Synonym potassium metabisulfite,
CAS 16731-55-8.
Chemical Formula K2S2O5,
Molecular Weight 222.32 g/mol,
Appearance White or slightly yellow crystalline powder,
Odor Sulfur-like, pungent odor,
Melting Point Decomposes at ~190°C,

Density 2.34 g/cm³,
Solubility Soluble in water (450 g/L at 20°C);
insoluble in alcohol,
pH (in aqueous solution) ~4.5 (10% solution),
Stability Stable under dry, cool, and sealed conditions but decomposes in moist air,
releasing sulfur dioxide (SO₂) gas,
Identifiers:
EC Number 224-142-6,
CAS Number 16731-55-8,
Chemical formula K2O5S2,
Molar mass 222.31 g·mol−1,
Appearance White crystalline powder,

Odor Pungent (sulfur dioxide),
Density 2.34 g/cm³ (solid),
Melting point 190 °C (374 °F; 463 K) decomposes,
Solubility in water 450 g/L (20 °C),
Solubility Insoluble in ethanol,
Molecular Weight 222.33 g/mol,
Hydrogen Bond Donor Count 0,
Hydrogen Bond Acceptor Count 6,
Rotatable Bond Count 0,
Exact Mass 221.8461284 Da,
Monoisotopic Mass 221.8461284 Da,

Topological Polar Surface Area 125 Å²,
Heavy Atom Count 9,
Formal Charge 0,
Complexity 136,
Isotope Atom Count 0,
Defined Atom Stereocenter Count 0,
Undefined Atom Stereocenter Count 0,
Defined Bond Stereocenter Count 0,
Undefined Bond Stereocenter Count 0,
Covalently-Bonded Unit Count 3,
Compound Is Canonicalized Yes.

FIRST AID MEASURES of POTASSIUM METABISULFITE:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation:
Fresh air.
*In case of skin contact:
Take off immediately all contaminated clothing.
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact:
Rinse out with plenty of water.
Call in ophthalmologist.
Remove contact lenses.
*If swallowed:
After swallowing:
Immediately make victim drink water (two glasses at most).
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of POTASSIUM METABISULFITE:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains.
Collect, bind, and pump off spills.
Observe possible material restrictions.
Take up dry.
Dispose of properly.
Clean up affected area.

FIRE FIGHTING MEASURES of POTASSIUM METABISULFITE:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2)
Foam
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of POTASSIUM METABISULFITE:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection.
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of POTASSIUM METABISULFITE:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of POTASSIUM METABISULFITE:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature) .
-Possibility of hazardous reactions:
No data available